<template>
	<view @click="echarts.onClick" :prop="option" :change:prop="echarts.updateEcharts" :id="option.id" class="echarts"/>
</template>

<script>
	export default {
		name: "Echarts",
		props: {
			option: Object
		},
		data() {
			return {};
		}
	}
</script>

<script module="echarts" lang="renderjs">
	let myChart
	export default {
		mounted() {
			if (typeof window.echarts === 'function') {
				this.initEcharts()
			} else {
				// 动态引入较大类库避免影响页面展示
				const script = document.createElement('script')
				// view 层的页面运行在 www 根目录，其相对路径相对于 www 计算
				script.src = 'static/echarts.js'
				script.onload = this.initEcharts.bind(this)
				document.head.appendChild(script)
			}
		},
		methods: {
			initEcharts() {
				myChart = echarts.init(document.getElementById(this.option.id))
				// 观测更新的数据在 view 层可以直接访问到
				myChart.setOption(this.option)
			},
			updateEcharts(newValue, oldValue, ownerInstance, instance) {
				// 监听 service 层数据变更
				myChart.setOption(newValue)
			},
			/**
			 * Echarts 视图点击事件
			 */
			onClick(event, ownerInstance) {
				// 调用 service 层的方法
				// ownerInstance.callMethod('onViewClick', {
				// 	test: 'test'
				// })
			}
		}
	}
</script>

<style scoped lang="scss">
	.echarts {
		width: 100%;
		height: 100%;
	}
</style>